(19)

(11)

EP 2 769 521 A1

(12)

(43) Date of publication: 27.08.2014 Bulletin 2014/35 (21) Application number: 11775762.5 (22) Date of filing: 21.10.2011

(51) International Patent Classification (IPC):  H04L 29/06(2006.01) H04L 12/70(2013.01) (86) International application number: PCT/EP2011/068480 (87) International publication number: WO 2013/056750 (25.04.2013 Gazette 2013/17)

(84) Designated Contracting States: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR (71) Applicant: Telefonaktiebolaget L M Ericsson (publ) 164 83 Stockholm (SE)	(72) Inventors: WITZEL, Andreas 52134 Herzogenrath (DE) KAMPMANN, Dirk NL-6291 GP Vaals (NL) (74) Representative: Medau, Jörn  Ericsson GmbH Patent Department Ericsson Allee 1 52134 Herzogenrath 52134 Herzogenrath (DE)